Months of carefully managed preparations conclude Friday when Prince William of Wales and his fianc, Catherine "Kate" Middleton, wed in a ritual blending tradition, pageantry and modernity under the gaze of a billion eyes and millions of tweets.

"This is completely insane. I think there's nothing else happening in the world!" says Jane Seymour, actress-turned-correspondent for Entertainment Tonight. "Clearly there is no news, because all the media are here."

Meredith Vieira has been in London all week covering the royal wedding festivities for Today. After every show she graciously greets and poses with fans (mostly Americans) who have come to watch the broadcast in action at NBC's Trafalgar stage.